Intro!
I'm always willing to give anyone a chance -- until they open their mouths and prove they're a complete idiot. Here's three things fairly common in the "wizarding world" people say which prove them to be stupendiously stupid.
I. Speaketh tha word "quantum"
If you're one of those people who pepper mask your blatant ignorance with the word "quantum" (in other words, have never stepped in a lab and use the word frequently) -- I gots a challenge for ya.